Pulp-engine



(No Model.)

G. W. CRESSMAN.

PULP ENGINE.

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ma mams Evans co., Fumo-uma., wAsH UNITED STATES PATENT GEEICE.

GEORGE w. oREssMAN, or BAnRoN HILL, PENNSYLVANIA.

PU LP-ENGINE.

SPECIFICATION forming' pari'. O` Le1'.terS Patent N0. 432,300, datedJuly 15, 1890. Application filed April 6, 1889. Serial No. 306,150. (Nomodel.)

T0 all whom, t ntay concern:

Be it known that I, GEORGE W. CREssMAN, a citizen of the United States,and a resident of Barron Hill, Montgomery county, Pennsylvania, haveinvented certainlmprovements in Pulp-Engines, of which the following isa specication.

The object of my invent-ion is to construct a pulp-engine for reducingrags and other paper-stock to a pulp inthe manufacture of paper, asfully described hereinafter.

The main object of my invention is to construct a machine that willbecompact and reduce the rags and stock more quickly than heretofore, andthat can be used as a single or double machine.

In the accompanying drawings, Figure lis a transverse sectional view ofmy improved pulp-engine. Fig. 2 is a plan View; and Fig. 3 is a sideView lookingin the direction of the arrow, Fig. 2, with parts insection.

A is the trough, of quadrangular form, as shown in the plan view, and inthe base A of the trough are the fixed blades a, of the constructionusual in pulp-engines. Situated directly above these blades a are thecylinders D D, having blades d, which operate in conjunction with thefixed blades in pulping the material introduced into the engine.

The cylinders D D are mounted on shafts E t', having their bearings inlevers F F, pivoted at ff. The bearing-levers F F of the shaft E can beraised or lowered simultaneously, so that an even adj ustmentisobtained. The bearings F of the shaft E can also be adjustedsimultaneously forthe same purpose. The bottom of the trough is madeconcave for the reception of the cylinders D; but it will be understoodthat the cylinders do not fit snugly in the concave, but plenty of roomis afforded for the passage of the material. Directly under the rollsthe stationary knives a come in contact or nearly in contact with theknives of the cylinder D. The two central ooncaves come together at mandform an edge, by which the material is divided.

Above the cylinders D D are concaves or coverings lvl H, over which thematerial passes as it is forced from under the cylinders. These concavesprevent the material from clogging the blades of the cylinders at thetop, and also provide a smooth surface, over which the material may bepassed to again enter between the blades of the cylinder and thestationary blades.

The trough A is built up, as shown in Fig. l, so as to make acomparatively small inletopening and prevent the splashing of thematerial as the cylinders revolve.

Separating the machine into two parts is a gate or partition G, which isadapted to grooves in the sides of the trough. The object of thisremovable gate or partition is to separate the machine into two parts,so that when long rag stock is to be broken it will pass much morefrequently between the knives; but when the stock is suiiiciently brokenthe partition or gate is removed, 'allowing the pulp from the halves ofthe machine to come violently together above the edge fr, the cylindersbeing driven in the direction indicated by the arrows in Fig. 1, thepulp also taking the course indicated. Thus the pulp from the twosections becomes thoroughly incorporated and an even product is assured.

Passing through the vertical supports at each side of the trough is ascrewshaft t', adapted to a nut t', which rests against the under sideof the bearing-levers F, the upper end of the shaft being provided withahandwheel I on turning which the nut is raised or lowered, thus raisingor lowering the pivoted bearing-lever F. The screw-rodsz' are gearedtogether through the medium of the shaft J, which has bevel-wheels] ateach end, which mesh with bevel-wheels j on the screwshafts t' t', sothat when one screw-shaft is turned the other will be likewise turned,thus giving an even adjustment at both ends of the shaft.

This mechanism is duplicated in connection with the shaft E. The shaftsE E are pro vided with pulleys K K', over which the driving-belts pass.

It will thus be seen by the above description that I am enabled toconstruct a machine that will be compact and will agitate the materialand pulp it much more quickly than machines now in common use, as thematerial passes the knives more rapidly and oftener. 10o

and stationary knives in saideoncav'e, with a knife-cylinder directlyabove each set ol. stationary knives, with a removable gate or partition adapted to pass between the two cylinders and separate themachine in two parts, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

' GE()RGE \V. CRESSMAN.

Witnesses:

HARRY SMITH, HENRY I IoWsoN.

